Needle-leaved Mountain Coprosma (Coprosma rugosa) showing its distinctive needle-like leaves and dense branching

Needle-leaved Mountain Coprosma

Coprosma rugosa

Not Threatened

Needle-leaved Mountain Coprosma, also known as Coprosma rugosa, is a hardy native shrub with distinctive needle-like leaves and dense, bushy growth. This resilient species forms extensive thickets in grasslands and forest margins throughout New Zealand, making it an excellent choice for hedging and windbreaks. It is valued for its drought tolerance and ability to provide shelter for native wildlife. native shrubs

Needle-leaved Mountain Coprosma (Coprosma rugosa) showing its distinctive needle-like leaves and dense branching

Image credit: Needle-leaved Mountain Coprosma (C. rugosa). Wikipedia

Quick Facts

Quick Facts Overview

Scientific Name Coprosma rugosa
Height Up to 3 meters
Spread 1.5-2 meters
Water Needs Low to moderate
Light Full sun to light shade
Frost Tolerance Moderate (hardy zone 7)
Salt Tolerance Good
Growth Rate Moderate
Lifespan Long-lived perennial

Climate Best Suited to

Needle-leaved Mountain Coprosma is highly adaptable and grows throughout New Zealand from lowland areas to subalpine zones. It tolerates a wide range of conditions including coastal exposure, moderate frost, and drought conditions once established.

Regional Suitability

City Climate Suitability
Whangārei Ideal
Auckland Ideal
Hamilton Ideal
Tauranga Ideal
Rotorua Ideal
Gisborne Ideal
New Plymouth Ideal
Napier Ideal
Whanganui Ideal
Palmerston North Ideal
Wellington Ideal
Nelson Ideal
Christchurch Ideal
Dunedin Ideal
Invercargill Ideal

Growing Requirements

Soil Requirements

Needle-leaved Mountain Coprosma is adaptable to various soil conditions:

  • Prefers moist, well-drained neutral to slightly acidic soil
  • Tolerates light sandy and medium loamy soils
  • Handles poor and dry soils once established
  • Avoid waterlogged conditions to prevent root rot
  • Performs well in coastal sandy soils

Light Requirements

Needle-leaved Mountain Coprosma thrives with:

  • Full sun for richest foliage color and compact growth
  • Tolerates light shade but may become more open in habit
  • At least 4-6 hours of direct sunlight for best performance
  • Benefits from morning sun with some afternoon protection in hot climates

Water Requirements

Once established, Needle-leaved Mountain Coprosma is drought-tolerant:

  • Regular watering during establishment (first 1-2 years)
  • Drought-tolerant once well-established root system develops
  • Benefits from occasional deep watering during extended dry periods
  • Reduce watering in winter when growth slows
  • Avoid overwatering which can lead to root rot

Uses & Significance

Garden & Restoration Uses

  • Understory shrub for forest edges and light shade
  • Wildlife value via nectar, pollen, and berries for birds
  • Fine-textured filler or hedge component in native gardens
  • Resilient framework species for ecological plantings

Seasonal Care Calendar

Spring

  • Active growth period begins
  • Apply light feeding with slow-release organic fertilizer
  • Best time for pruning before new growth starts
  • Plant new specimens or take cuttings
  • Monitor for any pest activity

Summer

  • Peak growing season with rapid new growth
  • Regular watering for newly planted specimens
  • Trim hedges to maintain shape if desired
  • Monitor container plants for water needs
  • Watch for scale insects or other pests

Autumn

  • Foliage colors may deepen to orange-brown tones
  • Small purple-white berries develop and ripen
  • Good time for planting new specimens
  • Reduce watering frequency as growth slows
  • Collect seed if propagation is desired

Winter

  • Minimal care required during dormant period
  • Protect young plants from severe frost
  • Move containers to sheltered locations in very cold areas
  • Avoid pruning during coldest months
  • Plan for spring planting and maintenance

When to Prune and How Much

When to Prune and How Much Overview

Needle-leaved Mountain Coprosma responds well to pruning and can be shaped as desired:

  • Tolerates heavy clipping making it excellent for formal hedges
  • Prune in late winter to early spring before new growth
  • Remove dead, damaged or diseased branches any time
  • Trim hedges 2-3 times per year to maintain shape
  • Can be cut back hard if rejuvenation is needed
  • Light pruning encourages denser, more compact growth

Always use clean, sharp tools for pruning to minimize disease risk. The dense branching habit responds well to regular trimming.

Planting Guide

When to Plant

The best time to plant Needle-leaved Mountain Coprosma is during autumn or spring when temperatures are mild and rainfall is reliable. This gives the roots time to establish before extreme weather.

Site Selection

Choose a site with:

  • Full sun to light shade
  • Well-draining soil (adaptable to most soil types)
  • Protection from strong winds for young plants
  • Adequate space for mature size (3m tall, 1.5-2m spread)
  • Consider use as hedge or windbreak

Planting Procedure

  1. Dig a hole twice as wide and same depth as the root ball
  2. Add compost to heavy clay soils to improve drainage
  3. Position plant so crown sits at soil level
  4. Backfill with soil, gently firming to remove air pockets
  5. Create watering basin around plant
  6. Water thoroughly after planting
  7. Apply mulch layer, keeping away from stem

Initial Care

Water regularly during the first growing season. Once established, Needle-leaved Mountain Coprosma is quite drought-tolerant but will grow more vigorously with occasional watering during dry periods.

Propagation Methods

From Seed

Growing Needle-leaved Mountain Coprosma from seed requires patience:

  1. Collect ripe purple-white berries in late summer to autumn
  2. Remove pulp and clean seeds thoroughly
  3. Sow fresh seed immediately in seed-raising mix
  4. Keep consistently moist but not waterlogged
  5. Germination can be slow, taking 6-18 months
  6. Maintain at cool temperatures (15-20°C)
  7. Transplant when seedlings reach 5cm tall

Note: Plants are dioecious (separate male and female plants), so both are needed for fruit production.

From Cuttings

Semi-hardwood cuttings taken in late summer are most successful:

  1. Take 8-10cm cuttings from current year's growth
  2. Remove lower leaves, keeping 4-6 pairs at tip
  3. Dip in rooting hormone if available
  4. Plant in free-draining propagation mix
  5. Maintain high humidity with plastic cover
  6. Keep in bright, indirect light
  7. Rooting typically occurs in 6-10 weeks

Cultural History

Needle-leaved Mountain Coprosma (Coprosma rugosa) is part of New Zealand's indigenous flora heritage and belongs to the diverse Coprosma genus, which holds cultural significance in Māori tradition:

Traditional Connections

  • Food Source: While this specific species' fruits are small, other Coprosma berries were eaten by Māori, particularly children who enjoyed the orange fruits of larger species
  • Practical Uses: The broader Coprosma genus provided materials for traditional practices including fiber dyeing
  • Natural Indicators: Dense thickets served as natural markers in the landscape
  • Shelter: Provided protection for travelers and wildlife in exposed mountain areas

Ecological Heritage

  • Forms an important component of New Zealand's grassland-forest margin ecosystems
  • Has coevolved with native birds that disperse its seeds
  • Provides crucial habitat connectivity in fragmented landscapes
  • Represents the adaptation of New Zealand flora to harsh mountain conditions

Modern Conservation Role

Today, Needle-leaved Mountain Coprosma continues to play an important role in ecosystem restoration projects and provides gardeners with a hardy, low-maintenance native option that supports local biodiversity while requiring minimal inputs once established.

Pests & Diseases

Scale Insects

  • Symptoms: Yellowing leaves, sticky honeydew, small brown or white scales on stems and leaves
  • Management: Spray with horticultural oil or insecticidal soap; systemic insecticides for severe infestations
  • Prevention: Maintain good air circulation; avoid over-fertilizing which can attract scales

Root Rot

  • Cause: Fungal pathogens in waterlogged soils, particularly Phytophthora species
  • Symptoms: Wilting despite moist soil, yellowing leaves, stunted growth, plant collapse
  • Management: Improve drainage; reduce watering; remove affected plants; apply fungicide to soil if necessary
  • Prevention: Plant in well-draining locations; avoid overwatering

Powdery Mildew

  • Symptoms: White powdery coating on leaves, particularly in humid conditions
  • Management: Improve air circulation; apply fungicidal spray if severe; remove affected leaves
  • Prevention: Avoid overhead watering; ensure adequate spacing between plants

General Health Issues

  • Frost damage: Young plants may suffer tip burn in severe frosts - protect with frost cloth
  • Wind damage: Exposed locations may cause leaf scorch - provide windbreak for young plants
  • Nutrient deficiency: Yellowing leaves may indicate poor soil - apply balanced slow-release fertilizer

Needle-leaved Mountain Coprosma is generally robust and pest-resistant when grown in suitable conditions. Most problems arise from poor drainage or environmental stress.

Bonus Tip

Bonus Tip Overview

For the best hedge performance, plant Needle-leaved Mountain Coprosma specimens 60-80cm apart and trim lightly but regularly from a young age. This creates a dense, formal hedge that can be maintained at any desired height. The needle-like foliage creates an attractive fine-textured surface that contrasts beautifully with broader-leafed plants in mixed plantings.

Cultural Significance

Cultural Significance Overview

Learn more about the cultural significance of native shrubs in Cultural Plants.

Plant Description

Plant Description Overview

Coprosma species are evergreen shrubs or small trees with opposite leaves, small flowers, and colourful berries. This species forms a tidy framework with small to medium leaves and seasonal orange to red fruit that attracts native birds.

Natural Habitat

Natural Habitat Overview

Lowland to montane forest margins, light scrub, and regenerating woodland on free-draining soils with reasonable moisture. Performs best with good light and airflow.

Plant Ecology

Plant Ecology Overview

Provides nectar and pollen for insects; berries for birds that disperse seed locally. Dense branchwork offers microhabitats and shelter for invertebrates and small birds.

Ecological Role

Ecological Role Overview

Acts as a mid-storey framework species, quickly adding cover and food while tolerating varied conditions. Useful for building wildlife corridors and shading weeds.

Site Requirements

Site Requirements Overview

  • Light: Full sun to light shade; fruiting often best with more light.
  • Soil: Free-draining loams or gravels; avoid chronic waterlogging.
  • Moisture: Moderate; drought-tolerant after establishment.
  • Exposure: Wind tolerant; shelter improves foliage quality inland.

Water through the first summer; mulch annually to conserve moisture. Minimal feeding required; a light spring feed suffices on poor soils.

Planting

Planting Overview

  1. Plant in autumn or spring into prepared, weed-free soil.
  2. Set at pot depth; firm and water to settle.
  3. Mulch 5–8 cm, keeping material clear of stems and trunk base.

Care and Maintenance

Care and Maintenance Overview

Tip-prune lightly to maintain form and density. Remove dead or crossing wood as needed. Monitor for scale on stressed plants and improve airflow if issues arise.

Landscaping Uses

Landscaping Uses Overview

Useful in wildlife hedges, mixed native borders, and shelterbelts. Pairs well with pittosporum, olearia, hebes, and flaxes for layered, resilient plantings.

Conservation

Conservation Overview

Generally Not Threatened and common in the wild. In restoration, use eco-sourced plants appropriate to the local provenance and control weeds during establishment.

Cultural Section

Details

This plant has cultural associations in Aotearoa and is valued in restoration and gardens for ecological services; use eco‑sourced stock near natural areas.

Coprosma species held important cultural significance for Māori, with the orange berries of larger species like karamū (C. robusta) eaten by children as a traditional food source. Kanono (C. grandifolia) was particularly valued for its bark, which provided a vibrant orange dye used in traditional crafts and ceremonial items. These versatile shrubs were integrated into daily life, providing both sustenance and materials for cultural practices.